MX* Problematic pool cleaner

I purchased a MX8 pool cleaner a while back and worked fine then all of a sudden the cleaner stops working. I take it for repairs and they replace some parts and it starts to work correctly, then after about 2 months its stops working. <br> <br> Why is this pool cleaner so problematic? I tried cleaning the inside of the machine then it works for about 20 seconds and then just stops.<br> <br> Not happy with this pool cleaner since its very temperamental and needs constant attention. My warranty ended last November and i doubt that Zodiac will fix the item since it did go in for repairs and was not fixed.